I have a barely used wide angle lens for sale. I'm upgrading to a new system and this this isn't compatible with my new housing. Here is a link to some information about this lens. http://www.inon.jp/p...0028ad/top.htmlThis lens has no defects or scratches and is in excellent condition. I also have an adapter available which I used with an Olympus PT-43 housing. The link above has information as to compatibility and which adapter you would need. I also have a good contact at Inon that is also very helpful(Inon has great customer service). If you have questions please ask. I am looking to get $325 for lens (includes shipping in US only) and if you need the adapter I will sell both for $360 (including shipping in US)